A:-(100)
8:-(200)
0:-110)
D:-(222)
Correct Answer:- Option-A
Question57:-The reciprocal lattice to a BCC lattice is a lattice of type
A:-Simple cubic
B:-BCC
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D:-none of the above
Correct Answer:- Option-C
Question58:-Hall co-efficient gives an indication of
A:-thermal conductivity
B:-specific heat capacity
C:-camier concentration
D:-None of the above
Correct Answer:- Option-C
Question59:-If the fermi energy of copper is 7.0 eV, what is the corresponding fermi temperature 7
A:-81.2K
B:-812K
C:-8120K
D:-81200 K
Correct Answer:- Option-D
Question60:- Which of the following is not true for type | super conductor
A:-Exhibit complete Meissner Effect
B:-Perfect diamagnetism below Tc
C:-Also known as soft superconductors
D:-Exhibits a vortex state
Correct Answer:- Option-D
Question61:-Average Binding Energy of a nucleon in the nucleus of an atom is

Correct Answer:- Option-C
Question62:-Weak nuclear forces act on
A:-both hadrons and leptons
B:-hadrons only
C:-all particles
D:-all charged particles
Correct Answer:- Option-A
Question63:-An admissible potential between the proton and neutron in a deutron is
A:-coulomb
B:-harmonic oscillator
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D:-infinite square well
Correct Answer:- Option-C
Question64:-" *Half life of a radio active material 15 4 days. After 20 days the fraction remaining undecayed will be
A:-1/32
68.0
6۴6
0-8
Correct Answer:- Option-A
Question65:-Nuclear fusion requires high temperature because
ക: nuclear reactions absorb heat
B:-the particles can not come closer unless they are moving rapidly
C:-the B.E. must be supplied from an extemnal source
D:-mass defect must be supplied
Correct Answer:- Option-B